// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
// This file is copied from
// https://github.com/ClickHouse/ClickHouse/blob/master/src/Common/Allocator_fwd.h
// and modified by Doris

/**
  * This file provides forward declarations for Allocator.
  */
#pragma once

#include <cstddef>
class DefaultMemoryAllocator;
template <bool clear_memory_, bool mmap_populate = false, bool use_mmap = false,
          typename MemoryAllocator = DefaultMemoryAllocator>
class Allocator;

template <typename Base, size_t N = 64, size_t Alignment = 1>
class AllocatorWithStackMemory;
